Gaging device for mortisi ng-m ach i nes



(No Model.)

J. E. KESSLER.

GAGING DEVICE FOR MORTISING MACHINES.

No. 360,303. Patented Mar. 29, 1887.

' fnyanfar 9% yaw NITED STATES PATENT Fries.

JOHN E. KESSLER, OF MIDDLEPORT, OHIO.

GAGING DEVICE FOR MORTISING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 360,303, dated March 29, 1887.

Application filed August 27, 1886. Serial No. 211,970. (No model.)

T all whom it may concern.-

Be it known that I, JOHN E. KEssLER, a citizen of the United States, residing at Middleport, Meigs county, State of Ohio, have invented a new and useful Gaging Device for Mortising-Machines, of which the following is a specification.

My invention may be used in connection with foot or power mortising-machines, and is principally intended for straight work-such as the uprightposts of furniture, for instance into which cross-rails are mortised.

In view of the necessity of absolute equality of the single pieces and equidistance of the mortises, which is imperatively necessary in such work, the object of myinvention is to provide a device which, once adjusted, acts automatically, and may be used in a certain position as long as work of corresponding kind is being done. It dispenses with the marking of the wood beforehand, prevents any possible mistakes of the feeding-operator by overrunning the marks, and enables him to finish a certain piece of work entirely by only clamping it once-that is, at the beginning.

I attain the objects of my invention by the construction illustrated in the accompanying drawings, in which- Figure 1 is a front view of the lower part of a power-mortiser. Fig. 2 is a top view of the feeding-table. Fig. 3 shows one of the gages detached. Fig.4 shows a finished piece of wood.

1 is the upright standard or column of a mortiser, 2 is the chisel-mandrel, and 3 the boring attachment, all driven by a suitable mechanism. (Not shown in the drawings.)

4 is the bed or feeding-table, against the back 5 of which is clamped the wood 6 by two screws, 7. Bedplate 4 has on its under side a rack, 8, into which pinion 9 on shaft of hand or feed wheel 10 meshes, and by which said bed-plate is moved from right to left, or vice versa. The shaft of this hand-wheel passes through and revolves in casting 11, on which bed-plate 4 slides. This casting 11 is adjustably secured to a plate, 12, which slides up and down on column 1, and is connected with a treadle, 13, by which all these parts may be quickly raised or lowered, bringing the wood 6 quicklyin or out of reach of chisel 14. By means of crank 15 plate 12 and its parts maybe held in a cer tain height, and by means of crank and screw 31 table 4 may be moved to or from the operator.

For well known reasons the vertical or straight portion 16 of the chisel must always be preceding in approaching, or, rather, being approached by, one end of the mortise, and therefore the tool has to be reversed once in every mortise-that is, it is started in about the center of the mortise to be made and worked to one end of it. The table is dropped then, bringing the wood out of the chisel, and raised again by means of treadle 13. In raising it a suitable mechanism, located inside of column 1, reverses the chisel, which is now worked to the other end of the mortise. Up to this point all parts of the construction described are old and well known.

For the reasons and with the objects in view as stated at the beginning, I have devised gages 17, of different lengths and number of notches, corresponding with different work to be done, and which are screwed to the sliding table 4. The notches 18 (see Fig. 3) represent the mortises, and correspond in number with the work to be performed.

In commencing to make mortise 19, (see Fig. 4,) the table 4, in its lowered position and provided with gage 17 is moved by hand-wheel 10 till spring-catch 20, kept always against the gage by spring 24, is about in the center of the first notch. The table is then raised into the chisel and fed to the right (position of chisel to be now as shown in Fig. 1) till spring-catch 20 strikes corner 21 of the first notch. The table is then dropped and raised again, which action reverses the chisel, and fed to the left till catch 20 strikes corner 22 of the notch, by which time the first mortise is completed. The table is dropped now, spring-catch 20 is lifted out by its knob 25, and, after feeding till catch 20 snaps into the next notch, raised again into the chisel.

In commencing the next mortise the direction in which the operator has to feed must always be against the vertical part 16 of the chisel, and therefore depends always on the position of that part. An adjustable stop, 23, is provided on back 5, to mark the proper place where to clamp the wood at the beginning.

Instead of lifting spring-catch 20 out with the hand by its knob 25, a lever, 26, fulcrumed at 27, may be connected thereto, which at its other end, in a sleeve, 28, carries an upright rod, 29. This rod is so adjusted relatively to r the height of the table 4 that when the latter is dropped it strikes the floor, and is sufficiently longer to lift spring-catch 20 out of the notch it then occupies.

When it is desirable to use the boring attachment 3, sliding table 4 is moved to the right till catch 20 is opposite the next first one of marks 30 on the gage and next to the left of the corresponding notch. The distance of said marks from the center of the notches is the same as the one from the chisel to the boring-tool.

Having thus explained myinvention, what I claim as new is asfollows:

' Ina morti'sing-niachine, the combination of feeding-table 4, interchangeable gage 17, hav- 2o ing notches l8 and marks 30, and the stopping and releasing device secured to (in reference to sliding table 4) stationary part 11 and consisting in catch 20, spring 24, knob or stud 25, fulcrumed lever'26, fulcrum 27, sleeve 28, and 25 adjustable rod 29. I

In testimony of which invention I hereunto set my hand.

JOHN E. KESSLER. Witnesses:

CARL SPENGEL, G120. \V. HARDING. 

